CVE-2021-43549

{"containers": {"cna": {"affected": [{"product": "PI Web API", "vendor": "OSIsoft", "versions": [{"lessThanOrEqual": "2019 SPI", "status": "affected", "version": "All versions", "versionType": "custom"}]}], "datePublic": "2021-11-09T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "A remote authenticated attacker with write access to a PI Server could trick a user into interacting with a PI Web API endpoint and redirect them to a malicious website. As a result, a victim may disclose sensitive information to the attacker or be provided with false information."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:N", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "description": "CWE-79 Cross-site Scripting (XSS)", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2021-11-18T14:18:48.000Z", "orgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6", "shortName": "icscert"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-313-06"}], "source": {"discovery": "UNKNOWN"}, "title": "OSIsoft PI Web API", "workarounds": [{"lang": "en", "value": "OSIsoft recommends upgrading to PI Web API 2021. Additional information can be found in the OSIsoft PI Web API security bulletin (registration required).\n\nOSIsoft recommends applying the following workaround in PI Web API to help reduce the risk:\n\nRemove the OSIsoft.REST.Documentation.dll from the PI Web API installation directory.\n\nThe PI Web API installation directory is available at this registry entry:\n\\\\HKLM\\SOFTWARE\\PISystem\\WebAPI\\InstallationDirectory\nThe default PI Web API installation directory is:\nC:\\Program Files\\PIPC\\WebAPI\nRemoving this file will cause built-in documentation to no longer be available. Navigating to the PI Web API endpoint with a browser will result in an error; however, the PI Web API will continue to function as a REST API\nDocumentation can be found at the OSIsoft website. Alternately, users are encouraged to limit access to PI Web API built-in documentation to dedicated development environments\nOSIsoft recommends users employ the following defense measures to lower the impact of exploitation for PI Web API:\n\nAvoid adding authentication type \u201cAnonymous\u201d in PI Web API configuration settings to limit exposure to authenticated users only,\nConsider using a web application firewall to block html responses from PI Web API servers,\nAudit the AF hierarchy to ensure there are no unauthorized databases, elements, or attributes,\nFor Kerberos authentication configurations, use Group Policy to deny network authentication to PI Server Administrator accounts on the PI Web API server.\nSee the OSIsoft customer portal knowledge article for additional details and associated security updates (registration required)."}], "x_generator": {"engine": "Vulnogram 0.0.9"}, "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "ics-cert@hq.dhs.gov", "DATE_PUBLIC": "2021-11-09T19:12:00.000Z", "ID": "CVE-2021-43549", "STATE": "PUBLIC", "TITLE": "OSIsoft PI Web API"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "PI Web API", "version": {"version_data": [{"version_affected": "<=", "version_name": "All versions", "version_value": "2019 SPI"}]}}]}, "vendor_name": "OSIsoft"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "A remote authenticated attacker with write access to a PI Server could trick a user into interacting with a PI Web API endpoint and redirect them to a malicious website. As a result, a victim may disclose sensitive information to the attacker or be provided with false information."}]}, "generator": {"engine": "Vulnogram 0.0.9"}, "impact": {"cvss": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:N", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-79 Cross-site Scripting (XSS)"}]}]}, "references": {"reference_data": [{"name": "https://us-cert.cisa.gov/ics/advisories/icsa-21-313-06", "refsource": "MISC", "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-313-06"}]}, "source": {"discovery": "UNKNOWN"}, "work_around": [{"lang": "en", "value": "OSIsoft recommends upgrading to PI Web API 2021. Additional information can be found in the OSIsoft PI Web API security bulletin (registration required).\n\nOSIsoft recommends applying the following workaround in PI Web API to help reduce the risk:\n\nRemove the OSIsoft.REST.Documentation.dll from the PI Web API installation directory.\n\nThe PI Web API installation directory is available at this registry entry:\n\\\\HKLM\\SOFTWARE\\PISystem\\WebAPI\\InstallationDirectory\nThe default PI Web API installation directory is:\nC:\\Program Files\\PIPC\\WebAPI\nRemoving this file will cause built-in documentation to no longer be available. Navigating to the PI Web API endpoint with a browser will result in an error; however, the PI Web API will continue to function as a REST API\nDocumentation can be found at the OSIsoft website. Alternately, users are encouraged to limit access to PI Web API built-in documentation to dedicated development environments\nOSIsoft recommends users employ the following defense measures to lower the impact of exploitation for PI Web API:\n\nAvoid adding authentication type \u201cAnonymous\u201d in PI Web API configuration settings to limit exposure to authenticated users only,\nConsider using a web application firewall to block html responses from PI Web API servers,\nAudit the AF hierarchy to ensure there are no unauthorized databases, elements, or attributes,\nFor Kerberos authentication configurations, use Group Policy to deny network authentication to PI Server Administrator accounts on the PI Web API server.\nSee the OSIsoft customer portal knowledge article for additional details and associated security updates (registration required)."}]}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T04:03:07.669Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-313-06"}]}]}, "cveMetadata": {"assignerOrgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6", "assignerShortName": "icscert", "cveId": "CVE-2021-43549", "datePublished": "2021-11-18T14:18:48.609Z", "dateReserved": "2021-11-08T00:00:00.000Z", "dateUpdated": "2024-09-16T23:00:26.909Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "PI Web API", "vendor": "OSIsoft", "versions": [{"lessThanOrEqual": "2019 SPI", "status": "affected", "version": "All versions", "versionType": "custom"}]}], "source": "ics-cert@hq.dhs.gov"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:osisoft:pi_web_api:*:*:*:*:*:*:*:*", "matchCriteriaId": "16945AFD-F9B6-499A-904A-E35EC8428CB0", "versionEndIncluding": "2019", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A remote authenticated attacker with write access to a PI Server could trick a user into interacting with a PI Web API endpoint and redirect them to a malicious website. As a result, a victim may disclose sensitive information to the attacker or be provided with false information."}, {"lang": "es", "value": "Un atacante remoto autenticado con acceso de escritura a un servidor PI podr\u00eda enga\u00f1ar a un usuario para que interactuara con un endpoint de la API web de PI y lo redirigiera a un sitio web malicioso. Como resultado, una v\u00edctima podr\u00eda revelar informaci\u00f3n confidencial al atacante o recibir informaci\u00f3n falsa."}], "id": "CVE-2021-43549", "lastModified": "2026-06-17T04:11:06.963", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "NONE", "baseScore": 3.5, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:S/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 6.8, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 1.7, "impactScore": 4.7, "source": "ics-cert@hq.dhs.gov", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 1.7, "impactScore": 2.7, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-11-18T15:15:10.030", "references": [{"source": "ics-cert@hq.dhs.gov", "tags": ["Third Party Advisory", "US Government Resource"], "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-313-06"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "US Government Resource"], "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-313-06"}], "sourceIdentifier": "ics-cert@hq.dhs.gov", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "ics-cert@hq.dhs.gov", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-79"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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